Telephone-receiver.



ESE "2' AVNLAESLE 6GP PATENTED SEPT. 6, 1904.

E. H. MANSON; TELEPHONE RECEIVER.

APPLICATION FILEE AUG.3, 1903.

NO MODEL mu IIWLL! 38 6f To (all whom if may concern:-

I I Patented eptember 6,

PATENT- ()rrica RAY H. MAXSOX'OF ammo. ILLIxoIs. Assn-son T0 KELLOUH- SWITCHBOARD & SUPPLY COMPA JY. (1)l lll( lA (:iO. I LLINOlS. A

* totgPoRaTIox or ILLINOIS.

- TELEPHONE-RECEIVER.

srncrrtcarron forming pairt of Application filed 'iugrs't 3,

Be it knownthatl. RAY H. MANSON. a citizen of theUni'ted States of America. and aresident of Cl'iicago'. county of Cook. and

State of Illinois, have invented a new and useful' Iinproyement in Tele'phone-Recci vc rs. of

which the-following is a specification.

, ablysuch as' are "My invention relates to telephone-reccir-ers of the so-called Watchcase ty )e and prefer- 'used as lIeHd IQCfQIVGIS tor telephone-switchboard operators.

'lt isone-object 'of my invention to provide a receiver of this type with Inclosed binding posts arranged in .such manner that the receiver-cord.-terminals when connected with *saidbinding-posts are inclos ed withinthe insulating -shellof the receiver, wherebv-thev f are preventedfrom beingshort-circuited by otherfparts of the receiver or other objects 1 or from coming into'contact with the person p of the switchboard operator-when supporting the same byhand.

- Another ob ect and protected binding-posts with means for operating the same from the exterior of the receiver-casing; whereby in order to connect An additional the receiver in the electrical circuit in which .3

ltisintended'tobe used itisunnecessary to take the receiver apart or todisturb its adjustment in any manner.

- orrough handling of. the receiver;

- hereinafter and still furtherfolnects are to provide-a more sub-v stantial construction throughout than is common in receivers of this type- To the accomplishment of. these objects a-ntl sucli others as may hereinafter appear I provide described, and particularly set. forth in the appendedclaims. reference be- 'ing had to the accompanying drawings. in

which the same reference characters are used throughout to designate like parts. and in i which- Eigure 1 is a sectional view, through a reis provide such inclos ed E hard rubber provided with exteriorthreads' object is to provide the permanent magnet of the receiver with suitable the parts and combinations of parts Letters Patent No. 769,658, dated September 8 1904.-

Serial No. 168,002. (No model.)

' ceiver crnbodving In v improvements. uFig. 2 is a face view of the receiver with the earpiccc o r cap and the diaphragm removed. Fig. 7 dis a rear face \iew of the rece iver with parts broken away to show the connection of one of the receiver-cord tips with the bindi'rig-post. Fig. i a sectional view on the line- 1: 4 of Fig. 3. I

Fig. :3 is a side view of the lIISI-XH nc'nt'in which the headband is secured therer toby-a diti'crent-form of hinge than in Figs.

1 and 3- Fig. 6 a rear view of the receiver provided with the latter form of head-band fastening. Fig. 7 is a view showing a modified form of the ends ofthe permanent-magnet p'icccs. Fig. 8 is a perspective View of soldered into theiend of the post. I T he shallow shell or casing -)fofthe receiver,

which is of in sulating material, preferably at its forwatfll end, upon which is screwed the preferably of the same; materi'al and serving to clamp the diaphragrnt against theforward end of the shell 2 and to protect the same, as well as to present, a neat and pleasing appearance. The permanent magnet ofthe receiver is placed within the hollow shell or casing '2 and consists of a'pliirality of semicircular stri I. or pieces of steel I or other suitable materitill each of which is permanently inagnetized. said'picces being placed one upon another and fitting along the inner periphery of the casing, with their ends I terminating over thfe portions 7 of the pole- --pieccs, as niore clearly-shown in Fig. '8. Tl

cap orearp'iecc 3,

{said pole-pieces are bent intermediate their ends, also as'shown in Fig. b -the portions 7* thereof passing beneath the adjacent ends of "the two sides of the permanent magnet and the pa rts t5 extcntlipginto proximity with the diaphragm of the instrument and carrying the magnet coils or spools 9. For the sake of a better iiiiish and appearance 1 place a thin black japanned strip 6 of metal overthe said entirely insulated and the magnet-conductor one of ihepole-pieccs of the permanent inag-' i l l l l l form of head-band this pole piecemightbe pieces 5, said strip being of the same form as the pieces .5. Suitable grooves are provided in the inner face of the shell or casing 2to receive the portion 7 of these pole-pieces. One of the pole-pieces is secured in place within the shell by means of a screw '10, threaded through the bottom of the shell and into the ole'piece, while the other pole-piece in this orm of the invention is held in place by a bolt or-screw 1 1, that passes through a suitabl'einsulating-bushing 12 in said pole-piece and through the securing-plate of the headband hinge, as hereinafter explainedpand is provided with a milled or thumb nut 13 upon the exterior of the casing. With adifferent secured in place by the same means as the other. A clamping-plate 14 is placed over and outside the ends of the pieces 5, and a .screw- 15 is passed therethrough and between the said ends of the permanent magnets and thence through the end 7 of the pole-piece and is threaded into a nut 16, that is fitted into a suitable depression 17, formed in the material of the casing. The nut 16 is irregular in outline and is prevented from turning by the walls of the depression 17, so that the screw 15 may be tightened therein to clamp the plate 14, the permanent-magnet pieces and the end 7 of the pole-piece together.- In the ordinary instruments of this type the. pole-pieces are supported upon the flat inner face of the shell,

1 and since only the ends of the permanent-magnet strips rest upon said pole-pieces they are otherwise unsupported throughout their length, and any jar-or shock of the instrument causes great strain upon the said clamping means and tends to loosen the connection, as

well as to shake them out of position. In this arrangement, however, the said magnet-strips are supported between their ends by the material of the shell, and such sudden jars or shocks do not. cause unusual strain upon the clamping means and do not tend to shake the."

magnets out of place.

As before stated, the bolt 11 passes through the bottom of the shell and serves to clamp in place the plate 18, to

' which the head-band 22 is pivotcd,-a steadypin 19 upon said plate entering a suitable aperture in the shell. Upon a pin 20, carried by the plate 18,' the member 21 is pivoted or hinged, and to the outer end of this plate the head-band 22 of usual form and construction is secured.

-In order to connect the magnet-coils 9 in the electric circuit in which the instrument is to be used, suitable binding-posts 23 are provided upon each side of the head-band hinge,

.said binding-posts being provided with enlarged outer ends fitting into suitably-formed apertures in the shell and with a threaded I I stem upon their innerends, to which the nuts 24 are secured. Suitable metallic washers are placed beneath the nuts 24 and are provided-with-integral projections 26, to which teases the terminal conductors 27 of the miignet coils are secured. When the nuts 24 are tightened,

the binding-posts are secured in position and the electric circuit of the coils 9 thereto is completed. These. binding-posts are provided with transverse apertures in the portion passing through the back of the shell that are adapted to receive the metallic tips of the receiver-cords. These apertures are in line with corresponding apertures formed in the rear wall or bottom of the casing and which are of suificient dimensions to receive the metal tips 28 of the receiver-cords 29. The

'reducedend of the tip is adapted to be inserted in the transverse aperture in the hinding-post, and a screw 30 in'the outer end of the post is adapted to clamp the tip in place within the same and to form a good electrical connection therewith.

- It will be observed that the binding-screws 30 are operated from the exterior of the'casing and that to connect or disconnect the receivercord tips it is unnecessary to open the shell or disturb the adjustment of the instrument in any way. The location of these bindingposts is such'that the metallic tips of the receiver-cord when connected with said binding-posts are entirely inclosed within the insulating-shell of thereceiver and are thereby prevented from cominginto contact withthe operators. person or other objects. It is comrnon for operators to ease the head: by drop- I ping the head-band back and supporting. the

receiver in the hand. The hand is thus liable to come into contact with the cord -tips if they project, and theyare also liable to be pressed into contact with the side of the face or the,

neck of the operator, whereby great danger of electric shocks exists.

It will be noticed that the hinge-plate 18 of the headband, as well as the bolt 11 and'nut 13, is entirely insulated from the electric circuit or working parts of the'receiver, so that no shocks can be received therefrom. In order to further insulate the binding-posts, I may use the arrangement shown in Fig. 9, in

iio

which the binding-posts proper do'not projcct beyond the outer face-of the shell, and the binding-screws 30 are provided with an insulating-cap 30, secured thereto inany desired manner, which fits closely within the aperture formed in the shell 2 to accommodate the enlarged end of the binding-post. A

suitable slot is formed centrally of said cap 30" to permit the insertion of a screw-driver to manipulate'the bindingr'screw 30L In this arrangement, as well as in the .former arrangement, it will be observed that there the receiver-cord project beyondgthe'edge of" the receiver. In Fig. 9 I also show the mags net-conductor 27. soldered directly intoan are no. projecting parts to catch in the hair may become loosened, a good electrical conii'perture formed in the inner end of the bind-d ing-post. whereby, althoughthe binding-post nection is stillmaintained. Ahothereommon method of hinging head-bands of receivers of this type to the casing is that shown in Figs.

and 6 and consists in employing a light metal yoke 31, pivoted tothe outer edges of the receiver shell'or casing.- It has also 7 been common heretofore to so locate the binding- EEQT AVAlLABLE COP" through in'tersectii'ig openings and inclosed their full length by the saidv shell. substantially as described.

i 3. The combination with a receirer having a shallow insulating-shell. of a permanent magnet and cooperating parts carried within the shell, and binding-postsfor the receiver extending through independent openings in the rear wall of the shell, of receiver-cord 'tips. and means for connecting said receivercord tips with said ljlinding-posts so that they "shall be inelosed practically their full length Wit-h when'dropped down into the position shown in dotted lines to engage the receiver-cord tips and short-circuit them thus cutting the receiver entirely out'ofthe circuit in which it was-intended to.be used. A This 'short-cir- 1 cuiting occurred more often at times when their. heads and held the instruments to their earswith' their hands. Vith the arrangement binding-postsby m'eansof the ordinary head- 1 band is prevented.-

In Fig. 7 I show an'arrangement in which a a more securefastening of the ends of the per- 'i ceiver-cord terminals connected to said posts manent magnets may be secured than that shown m Fig. 2 and in-which a greater surgage extraneous objects, substantiallyas deface 'contactibetween the, polepieces-and the magnet-pieces is secured. in thisform the ends of the permanent magnets are provided the operators removed the'head-bands'fro'rn by the shell. substantially as described.

4; In a telephone-receiver of the class de- I scribed. the combination witlra shallow insulating-shell, of a permanent magnet and co operating parts within the shell. interior bind ing-posts for said receiver with whichthe re ceiver cord terminals are-adapted to be connected, clamping devices carried by the'blndlug-posts and operablefrom the exterior of the shell. wl iereby. said cords may be con-. nected with the receiveror disconnected there- .from without opening the shell, substantially v p l as described. of the binding-posts and inclosed-tips described; herein suchshort-circuiting of the yond the center line of the fastened screw 1 into corresponding recesses formed in the op- I posite ends of the magnet-bars, so that the tendency of the magnet-pieces 5'to buckle or 5. In a telephone-receiver of the class described, thecombination with a shallow insulating-shellfofa'permanent magnet and (:0- operating parts within the shed-interior binding-posts carried by the; shell, metallic re and inclosed by the shell their full length, and means for operating said binding-posts from the exterior of the shell so that the receiver may be connected with the said cords or dis- 'connec-ted therefrom without opening the with pro ections 32 and 33, which extend beshell. substantially as described. 4

6. In a telephone-recon\er of the class described, thecoinbination with ashallow insuilating-shell, of a permanent magnet and co.- operating parts carried within the shell. bind twist out from beneath the clamping-plate 14 i is strongly resisted. It will be. observed that 3 5 within the shell. said posts having apertures ing-posts inserted in the rear wall of the shell 3 and suitably connected withthe magnet coils in line with other apcrturesin said rear wall;

'1 the latter apertures being designed to receive the receiver-cord terminals and to'- int-lose them when they are connected with the said Y posts, and binding-screwsinscrted in'the outer and cooperating parts within the shell. and interior binding-posts carried by thefshell and extending through independent openings in the rear wall thereof, of'receiver-cord tips connected with said posts,-said -post-s being so ends of said posts and adapted to be operated 5 from the-exterior of the shell tobindthe said located that the said tips do not p roject beyond the edge of the shell far enough to e'nscribed.

a shallow insulating-shell, a permanent magnet and cooperating parts within the shell, and

interior binding-posts extending thronght-he cord tips connected with said binding-posts scribed.

terminals in the .7. In a telephone-rccciver. the combination with a shallowinsulating-shell, of a circular permanent magnet composed of two semicircular parts fitting within the shell and at-' tachcd at 'their ad acent. ends to pole-pieces, 2. The combination with a receiver having posts. substantially as del and suitably. connected in the circuit of the receiver, said pern'ranent magnet parts being each supported substantially throughout that portion of its leng't lying between the said pole-pieces, substantially as described.

8. In a telephone-rece1ver, the combination with a shallow insulating-shell, of a permanent magnet comprising semicircular bars fitting around within the shell and along both sides, pole-pieces overlapping the adjacent I 5 ends of said bars to which they are secured,

the adjacent ends of said bars having interengaging projections and recesses, substantially as described. l

" 9. In a telephone-receiver of the class dero scribed, the combination with a shallow insu lating-shell, of a permanent magnet and cooperating parts within the shell, interior binding-posts extending through the rear 'wall of the shell and embedded therein apr5 proximately their full length, with which the receiver-cord terminals areadapted to be connected, said posts having their outer ends protected by insulation, so as to present no obstruction on the exterior of the shell, sub- 4 2o stantially as described.

10., In a telephone-receiver of the class described, the combination with a shallow insulating-shell, of a permanent magnet and coperatingvparts within the shell, interior binding-posts embedded in the shell approximately their full length and adapted to receive the receiver-cord terminals the exterior parts of the bindingsposts' being -each separately covered by insulation, substantially as 3 described;

11.- In a'telephone-receiver of the class described, tl'ie combination with an insulatingshell and a' permanent magnet and cooperating parts within the shell, binding-posts in- 55 serted through independent openingsin' the rear wall of the shell and suitably connected within the shell to the magnet-coils, each of said posts having an aperture in line withan other aperture in the rear wall of the shell.

4 this latter aperture being designed to receive and inclose or protect the receiver-terminal, a binding-screw inserted in the end of each binding post, and insulating means covering the outer ends of the bindingeposts and the binding-screws therein.

12. In atelephone-receiver, the combination with an insulating-shell and a permanent magnctand cooperating parts within the shell, binding-posts inserted in independent open- 5 'ings in the rear wall of the shell and suitably connected with the magnet-coils within the shell, each of these posts being adapted to close the opening in which it is inserted and each post being provided with an aperture for connection to a receiver-cord, the shell being provided with openings for the receiver: terminals, and the binding-screw .inserted'- in the head of each of the binding-posts.

13. In atelephone-receiver, the combination with an insulating-shell, of a permanent magnet comprising semicircular bars fitting aroundwithin the shell and along both sides,

I pole-pieces overlapping the adjacent ends of said bars, and means for detachablyclarnp BEST AVAiLABLE 0GP" ing the overlapping ends to the polepieces,

substantially as described. l p

14. The combination with a watchcase-re ceiver having a shallow insulating-shell, -a, -per manent magnet and cooperating parts within.

the shell, said shell having a comparatively thick. rear wall, binding-posts extending through openings in the rear wall of the shell,

said rear wall having openings leading from the edge of the shell and intersecting the opn ings of said bindingposts, a receiver-cordhaving conductors provided with metallic tips, said tips beinginserted in said intersect ing openings, and connecting with said binding-posts, the said tips when connected with salidlposts being inclosed by the material of the s e v r 15. In a watchcase telephone-receiver, the combination with ashallow insu lating-shell,of a permanent magnet and cooperating parts carried within the shell, said shell, having'a thick rear wall, binding-posts inserted in the rear wall of the shell and suitably connectedwith the magnet-coils within theshell, said posts having apertures in line with other intersectingapertures in said rear wall, a receiver-cord provided with comparatively long 7 and rigid metallic tips, said tips being inserted through said intersecting apertures and into the apertures of the posts-and when so connected with the posts to be inlosed and protected by the shell, and binding-screws inserted in the outer ends of said posts and operated from the exterior of the shell to bind the said tips in the posts.

16. In a telephone-receiver of the class described, the combination with a shallew insulatingshell, of a permanent magnet and cooperating parts within the shell, bindingposts inserted through independent openings inthe rear wall of the shell, the magnet-coil conductors being soldered to the inner ends of said posts within the shell, each of said posts having a transverse aperture in line with another intersectin'g aperture in the rear wall of the 'shell, this latter aperture being designed to the receiver-cord tips are designed to be conj nected. binding-screws in the outer ends of said posts, and operated from the exteriorof the shell, the outer ends of said posts as well as said screws presenting no'obstruction on the rearexterior face of theshell to catch into extraneous objects. a

18. In a telephone-receiver of the class denscribed, the combination with a shallow insnlating-shell, of a permanent magnet and co- 3 ing-posts embedded'in andextending through operating parts within the shell; interior bind the;- rear Wall of the shell with which the refceiver-cord tips are adapted to be connected,

" bindingscrews in the outer ends of said posts and operated ,fromthe exterior of theshell, the outer endsof said posts fitting closely the aperturesin the shell in which they are placed and the binding-screws fitting closely into countersunk apertures in the ends ofsaid' posts, whereby ,no obstructions are presented npon'the exterior of the shell to catch into .extraneons-ohjects 19. ,ln :1 telephone-receiver of the class de- :-;cz:ib ed',' the combination' with a shallow insulating shell, of a magnet. and cooperating parts within the shell, binding-postsemhe'dded in'the rear wallof theshell, lateral passages .in said-.-rear wall intersecting-the bindingpostsreceiier-cord terminals inclosed ineaid pissages,-a liead-band pivotally connected to saidshell and insulated from the electric circult of the receiver. r

20. In a tlephone=receiver of the'class de- I scribed, the combination with. a shallow insu lating-shell, of' a circular permanent magnet composed of two sen'1ic1rcularparts fitting within the shell and clamped at their adjacent ends to the cooperating pol e-pieces, magnet-coils located upon-said ipole-pieces and suitably'connected within the'circu-it of the receiver, said permanent-magnet'parts being each supported throughout that portion of its length lying-between said pole-pieces by the material of the-shell. V *21." In a -telephone-receiver, the combination with a shallow insulatingehell, of apermanent magnet compr sing-semicircular harsfitting around within the shell and upon both sides, polepieces overlapping the adjacent ends of the bars, and means to clamp said adjacent ends to the pole-pieces,- thesaid adjacent in ag'n et an 9353'? AVAHAELE ends of said here having projections extending 45 beyond the center line'of the said clamping means.

in a t-QlGPliOllB-I'BCGlVGl', the combination of an insulating-shelha permanent magnet and cooperating parts within the shell, 5 interior binding-posts,carried hy the shell, a receiver-cord havingmetallic terminals con* nected to said hindingqiosts and incloscd by "the shclL and means for operating said hinding-posts from the exterior of-the'shell, so 5 5 that the receiver may be connected with the said terminals ordisconnected therefrom with out opening the shell.

23., In a telephone-receiver, the combination of a shallow insulating-shell, a permanent 60 d cog'iperating parts within the shell, interior binding-posts carried hythe shell and accessible iroixi the exterior of the shell, a receiver-cord having metallic terminals con nect-e-d to said binding-posts and inclosed by 5' theshcll, a yoke carrying a head-band and being pivoted to said shell, for the purposes set'i'orth.

' 2a. In a telephone-receiver, the combination of an insulatiiigshell, a permanent mag- 70 net and cooperating-parts within the shell, interior binding-phsts carried by the shell,-

receirer-cords having their metallic-terminals down it will not strike against said metallic 0 terminals, and a head-hand attached to said yoke. A a

Signed by me at; Chicago, county-of Cook,

State of iliinois, this 30th day oi .l uly, 1903."

' RA 1' H. MANSON.

ROBERT Lewis ns. 

